一、保护地的意义和作用黑龙江省生产疏菜的时间只有一百五十天左右,其余二百多天主要靠冬贮菜供应市场。目前冬贮的传统大白菜、大萝卜、大头菜和土豆的需要量则有减少的趋势。例如哈尔滨市1984年11月至1985年6月,疏菜的总销售量为1,275亿斤,平均每人每天0.23斤。其中冬贮蔬 First, the significance and role of protected areas Heilongjiang Province, production of vegetables is only about one hundred and fifty days, the rest of more than 200 days mainly rely on winter storage vegetables supply market. The current winter storage of traditional Chinese cabbage, radish, rutabaga and potatoes have a decreasing trend. For example, from November 1984 to June 1985 in Harbin, the total sales volume of vegetables was 127.5 billion kg, an average of 0.23 kg per person per day. Which winter storage of vegetables